openusd 0.4.0

Rust native USD library
Documentation 
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#usda 1.0
(
    customLayerData = {
        string rootOnly = "root"
        dictionary nested = {
            string rootNested = "root"
        }
    }
    subLayers = [
        @./value_resolution_weak.usda@
    ]
)

# Specifier resolution (12.2.1): a local `over` opinion together with an
# inherit from a `class` resolves to `class`. The defining opinion comes
# from the inherit arc, and "all defining specifiers are class" → class.
over "InheritOnly" (
    inherits = </_AbstractBase>
)
{
}

class "_AbstractBase"
{
}

# Specifier "all over" rule: every authored opinion is `over` → `over`.
over "AllOver"
{
}

# Specifier precedence: a defining opinion (def in this layer) beats the
# `over` from a hypothetical weaker layer. Here only def is authored, so
# this exercises the simple case.
def "DefPrim"
{
}

# Custom + variability tests: the strong layer omits both fields.
def "CustomTest"
{
    int attr
}

def "VarTest"
{
    int attr
}

# Dictionary resolution (12.2.5): strong and weak dictionary-valued
# metadata compose recursively. Strong scalar values replace weak
# dictionaries, and strong dictionaries replace weak scalar values.
def "DictTest" (
    customData = {
        string strongOnly = "strong"
        string strongOver = "strong"
        dictionary nested = {
            string strongNested = "strong"
            dictionary deep = {
                string conflict = "strong"
                string strongDeep = "strong"
            }
        }
        string strongScalarWins = "strong-scalar"
        dictionary strongDictWins = {
            string strongNested = "strong"
        }
    }
)
{
}